Notify user of secondary email address. Fixes #1291.

[tompollard]

As discussed in #1291, the ResetPassword form only works for primary email addresses. This is confusing for users who try to reset their password using a non-primary email address (i.e. they do not receive a password reset email, and they are unable to register because the registration form rejects the email address).

This update addresses the issue by informing the user of the primary email address linked to their account. Now, when a user tries to reset their password using a secondary email address, they receive the following email:

Subject: Primary email address on DataShare
From: PhysioNet Automated System <[email protected]>
To: [email protected]
Date: Sun, 12 Nov 2023 11:27:57 -0000

You are receiving this email because you requested a password reset
for your account at DataShare.

Only your primary email address can be used for resetting your
password. Your primary email address is [email protected].

Regards
The DataShare Team

[bemoody]

Looks good, thanks!